Adjustable support for a signal



FIG. 1 is a front perspective view for an adjustable support for a signal showing my new design with the signal shown in upright condition with the broken lines shown for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a rear perspective view, with the signal shown in closed condition;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a rear elevational view thereof. 

The ornamental design for an adjustable support for a signal, as shown and described. 